I found the theorem of Pythagoras and the height of the triangle was 4a and then the hypotenous was 52a. I square rooted 52 and got 7 as the length of the square and then the area of the square is l×w which is 42

1/2 the height multiplied by base is = to the area of a triangle so 2a multiplied by 6a is equal to12a squared.This means the height is 4 . 4a squared plus 6 a squared is 16a squared plus 36a squared = 2 multiplied by the square root of thirteen a this in turn multiplied by itself is equal to 52a squared . Well that's what I did anyway